Take a look at the Find/Find Results menu

Ctrl+Space is the key binding for auto complete in Sublime Text 2 (and in many other applications), although there's nothing stopping you from rebinding it to something else.

You can do this using ctrl+space

Use the Find All button on the find panel to select all the matches, you can then copy them to the clipboard as usual.

This should be fixed in the current dev build (at http://www.sublimetext.com/dev), and will be in the next beta

This was added in 2139

This is because cmd+b is also bound to the same command, and the menu displays the first key binding listed for the command

There isn't, Sublime Text on OS X requires 10.6 or later

Please look at the section on the OS X command line in the Sublime Text 2 documentation: http://www.sublimetext.com/docs/2/

I believe, but haven't confirmed, that this is caused by VNC triggering menus manually, and not dispatching key events in the usual manner, so Sublime Text's input handling is bypassed. Other functionality will also not be working correctly in this scenario.